Function copyChartToClipboard

apps/chart-maker/main.js:635–678

()

    
    // 复制图表到剪贴板
    function copyChartToClipboard() {
        const chartWrapper = document.getElementById('chart-wrapper');
        
        // 创建加载指示器
        const loadingOverlay = document.createElement('div');
        loadingOverlay.className = 'loading-overlay';
        loadingOverlay.innerHTML = '<div class="loading-spinner"></div>';
        chartWrapper.appendChild(loadingOverlay);
        
        setTimeout(() => {
            html2canvas(document.getElementById('chart-canvas'), {
                backgroundColor: '#ffffff',
                scale: 2
            }).then(canvas => {
                // 移除加载指示器
                loadingOverlay.remove();
                
                canvas.toBlob(blob => {
                    try {
                        // 尝试使用现代API复制到剪贴板
                        if (navigator.clipboard && navigator.clipboard.write) {
                            const clipboardItem = new ClipboardItem({'image/png': blob});
                            navigator.clipboard.write([clipboardItem])
                                .then(() => {
                                    showNotification('图表已复制到剪贴板');
                                })
                                .catch(err => {
                                    legacyCopyToClipboard(canvas);
                                });
                        } else {
                            legacyCopyToClipboard(canvas);
                        }
                    } catch (e) {
                        legacyCopyToClipboard(canvas);
                    }
                });
            }).catch(error => {
                // 移除加载指示器
                loadingOverlay.remove();
                
                showNotification('复制图像失败，请重试', true);
            });
        }, 100);
    }
    
    // 兼容性较好的复制方法（通过创建临时链接）
    function legacyCopyToClipboard(canvas) {